Can we ever get financed?

I am 28 years old, have terrible credit due to my stupidity when I was younger. Still have problems with my credit biting at my heals.. My wife on the other hand has decent credit 700+ high score but not too much credit. My wife's income is poor. about $2000 grosse/month. Yet I'm a train conductor and grosse anywhere between $5500 & $7000/month. We don't have very much money saved up but tired of renting. Especially where we live. I have friends that pay 1/2 as much money on their morgage/month as we do renting/month. I work hard to provide for my family and want to own a house. We just married a year ago and really want to own a home. Please help..!

Thank you.
Carson Poore